The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1981
Filed:
Jul. 27, 1979
Joseph H Condon, Summit, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A line current measuring arrangement employs two matched toroidal cores with line windings, control windings, sense windings, and feedback windings. The line windings cause equal amounts of the same polarity of magnetizing intensity H in the two cores when a line current flows. The control windings are pulsed by control current pulses to cause equal changes of opposite polarity of control H in the two cores to drive the two cores to saturation of magnetic induction B. The sense windings are serially opposed so that the changes of B in the two cores cause sense voltages in polarity opposition. Any difference in the sense voltages, due to the presence of line current H, is cumulatively and algebraically integrated to provide a changing output voltage which is a measure of the cumulative integration. The output voltage causes feedback H in both cores in opposition to any line H. The output voltage becomes constant when the feedback H cancels the line H in both cores, whereupon the constant output voltage is a measure of any line current.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile